ANODEFLEX
Cathodic Protection for Buried
Pipelines
The Anodeflex system is an impressed current, flexible cable anode for use in cathodic protection systems for buried structures.Placed alongside a pipe or other buried metal structure, the Anodeflex system provides uniform cathodic protection to every point, with a minimum of interference from adjacent structures.
What is the Anodeflex system?
... a Cable Anode.
The five basic elements in the Anodeflex system are:
• a high performance coke breeze, serving as the active matrix in which the anodic reactions take place,
• a copper conductor serving as a low resistance busbar to deliver the required current over considerable distance without incurring substantial longitudinal voltage drop,
• a special conductive polymer that seals the conductor from chemical attack, yet allows current to flow from the conductor to the environment all along its length,
• a fabric jacket to hold the coke breeze in place around the anode cable. This jacket is designed to resist electro-chemical attack, but to allow current flow from the anode to the surrounding soil,
• a tough, porous non-conductive brading jacket encases the Anodeflex 1500-01, enhancing its abrasion resistance and preventing the fabric from being damaged.
Why use Anodeflex systems?
... to ensure uniform current distribution.
The Anodeflex system is used to achieve effective and homogeneous cathodic protection over the entire surface of the buried structure. Cathodic protection current should not be supplied to high demand areas at the expense of remote parts of the structure. Homogeneous distribution therefore is more important than current output. The Anodeflex system is a unique and cost effective way to keep the operation of a pipeline in compliance with cathodic protection DOT or other regulations. The use of the Anodeflex system on pipelines will eliminate many of the problems found with conventional groundbed anodes:
• it equalizes cathodic protection at consistent levels all along the line,
• its low overall current output will stop further coating degradation caused by cathodic disbonding when higher current output anodes are used,
• since the Anodeflex system is installed adjacent to the pipeline, and its current output per feet is low, interference problems are significantly reduced,
• in most cases the Anodeflex system can be installed in the pipeline ROW.
Where are Anodeflex systems used?
... to ensure protection in areas of concern.
One of the major uses of the Anodeflex system is in rehabilitation of pipelines, where ageing and degrading coatings no longer provide adequate corrosion protection. Re-coating the pipe is a very expensive solution, often requiring to shut down the pipeline over an extended period of time. In addition, the pipeline operator is facing major problems of obtaining environmental permits and disposal of toxic materials. Increasing current output of existing groundbed anodes is no longer an option, since this will aggravate the problem by further disbonding of the pipe coating. Installation of additional groundbed. This does not solve the problem; still underprotected area’s remain. The Anodeflex system offers a better, more cost effective, and environmental friendly approach to pipe rehabilitation. It is typically installed in the same right of way as the pipe, adjacent to the pipe, with only minimal disturbance of the environment.
Installation
Installation of the Anodeflex system is done using standard cable laying equipment, such as a hydraulic back hoe equipped with reel pay off equipment. A typical trench is only about 1 foot deep, and 6" wide, and no special backfill is required. Typical installation rates of 2 miles per day can be achieved. The Anodeflex system is supplied on a reel. A set of specially designed splice kits is available to handle in-line splices, branch off, and end termination.
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| Cathodic Protection Products |
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| AnodeFlex may be used at higher temperatures. Please consult with engineering support. |
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